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October 23-26, 2017 - Prague, Czech Republic
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Wednesday, October 25 • 14:15 - 14:55
Linux Storage System Bottleneck for eMMC/UFS - Bean Huo & Zoltan Szubbocsev, Micron

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The storage device is considered a bottleneck to the system I/O performance. This thinking drives the need for faster storage device interfaces. Commonly used flash based storage interfaces support high throughputs, eg. eMMC 400MB/s, UFS 1GB/s. Traditionally, advanced embedded systems were focusing on CPU and memory speeds and these outpaced advances in storage speed improvements. In this presentation, we explore the parameters that impact I/O performance. We describe at a high level how Linux manages I/O requests coming from user space. Specifically, we look into system performance limitations in the Linux eMMC/UFS subsystem and expose bottlenecks caused by the software through Ftrace. We show existing challenges in getting maximum performance of flash-based high-speed storage device. by this presentation, we want to motivate future optimisation work on the existing storage stack.

Wednesday October 25, 2017 14:15 - 14:55
Congress Hall I
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